Your size guide

We know that for you to feel great, you need swimwear that fits perfectly.

Though our swimwear isn't sized by cup sizing, we recognize that it can be difficult to know what size you are in swim tops. This sizing chart was designed to help you find your Heidi Klein size based on your bra size.

To read the chat: select your back size in the left hand column. Move across the row until you find your correct cup size, which will be listed in the horizontal column.

The black font is our mainline sizing while the golden font is our D-G range.

You may find that your size is listed in multiple places on the sizing chart. This is because we work with sister sizing. This means that there is a shift between the band size and the cup size to allow you to purchase a different size, though the top would still hold the same volume. For example, your sister size DOWN is one size smaller in the band and one cup letter size bigger than normal cup.